He said mosquitoes, which can carry West Nile virus, lay their eggs in or near standing water in places like gutters, pools or buckets.

Health officials said people can use mosquito traps, which can be found at local hardware stores, to keep mosquito larvae from hatching. They can be placed in pools or water that doesn't drain and are also safe for animals.

Last year, a man from Xenia tested positive for West Nile virus. The county used larvacide to control the mosquitoes around his home. They also started checking other areas for the disease too.

"So far in Greene County, we've tested nine mosquito pools and all have been negative for the West Nile virus," said Isaacson.

He said, if necessary, the county will use spray or fog to control mosquitoes in neighborhoods.

But the best way to control the bloodsuckers is to keep them away from water.